Rectilinear pump



Dec. 23, 1924. 1,520,621

` H. H. wATKlNs RECTILINEAR PUMP Fiied May 29, 1924 Z5 Y A gz i l" f2 if z /h y l i i 0 A 1 I f I 1 4 12 |l i 1 i i 7 s f f I 7 aucun-13 AVthe invention is toprovide a 'pump of the yopposed or tandem piston type, wherein one l`'the 'same into Vthe vsettling `compartment as u erating mechanism; and,

Patented Dec. 23, 1924.

:PATENT oFFIcE. I

'HERBERT n. wA'rxINs, or Homan, LofUIsr'aNa.

l nEcrILINEAn. Puur.

To all wlw/fn 'it may concern.' Y A,

, Be it known that I, HERBERT H.'WATKINS, acitizen of the United States of America, residing at'Homer, in the' parish of Claiyborneland State of Louisiana, have invented certain new and useful Improvements `in Rectlinear Pumps ;4 and I 'do hereby declare thatr thepvfollowing is a full, clear, concise, and 'exact description of the invention, vsuch as vwilll enable others l, skilled in the art to which'it appertains to make and Yuse the same.. l

This invention relatesto improvements in rectilinear pumps, having for an object to provide an oil' .pump adapted to elevate oil from a well into a settlingy or sand trapping compartment, whereupon suchI oil is re- `moved vfrom that compartment 1nto a relaying compartment, whereat it is subjected to pressure suiicient to ca use discharge of the same therefrom and its flowA from suitable conducting means.

Ano her and equally important object of of said` pistons serves to lift the oil and draw well as from the same, 'while the other `piston serves to force the oil'lifted by the firstv piston from the 'pump cylinder into arelayymg com artment, to `impart pressure thereto suiiicient to effect its discharge from the Ot er objects of the invention will "be 1n pargbvious, and in part .pointed out rhereina r.

In order that the inventionand its vmode of (operation may be readily understood by persons skilled in the art, I have inithe 'accompanying illustrative drawings, vand in the. detailed following description based thereupon, sety out one possibleembodiment,`

of the same.

In these drawings:

Figure 1 is a side elevationl of the improved pump showingthe same arranged in a well bore and connected with suitable opdrawings, in connection'fwith which like' characters of reference will designate corresponding parts lthroughout, the improved.

Pumlfmfy stated to comprise a cylindriand 6'of the barrel 1.' The lower the section l2, as will be noted, 1s` yformed directly below-the outlet end of the Application ined. my as, 1924. serial No. 716,809.

cal barrel 1 having its upper and lower ends engaged with reducerconnections Zand 3 respectively, the reduced open endsof the reducer 2 serving as the inlet yport` for the pump, whereas theopen Vouter end of the reducer 3 serves -as .an outlet port-, for the pump. The barrel 1, aswill be noted,lis composed of "several, sections having the adjacent ends thereof internally screw threaded and interconnected'by lmeans of a combined coupling and partition, generally indicated'by the numeralL 4', said coupling having circular screw threaded portions adapted to be engaged with the correspondingly threaded adjacentends ofthe'barrel sections, as is clearlyshown'in the Figure 2, thereby dividing said barrel into superposed compartments `5 and 6, the .compartment 5 servingas a settling compartmentor sand trap, while u the compartment" 6 serves as a relayingcompartment from, which the oil is forced by way of the outlet ofthe pump into suitable conduits for discharge therefrom.

A sand pipe 7 having a screw threaded lower end is turned into engagement 'with an internally screw threaded'portin 8 of the reducer2 and has a spherical valve cage yshown in the Figure 2, while a'l spherical valve 10 is arranged within said cage and is adapted to normally seat upon the open upper end of the sand pipe 7, thus providlng a suitable sand valve', common in pumps of this character.

Pump cylinder sections lland 12 arey arranged within the barrel 1 and disposed longitudinally thereof, as vclearly shown, Athe adjacent ends of ysaid sections being externally. screw 'threaded and turned into engagement with correspondingly .threadedportions of the combined coupling andr partition 4, thus immovably securing the same with respect to the' several 'compartments 5 rtion of with a plurality of circumferentiall 'disposed ports 13, theV purpose of whic will be hereinafter described, while the upper end of such sectionv12 terminates at a oint ucer 3 engaging the upper end of the pump barrel 1. l

f f Arranged for rectilinear movement in the `Isection 11 of the pumpv cylinder, whichfas will be noted is arrangedwithin the lower compartment 5, is a valved piston generally indicated herein'by, the numeral 14, such piston asis usual in devices of thischaracter being provided with a suitable form of spherical valve or similar device ,-15. Another piston 16 is arranged within'fthe seotion 12 of the pump cylinderfor rectilinear movement, but as will be noted, this particular piston isy of solid formation and has ythe packing 4cups 17 thereof inverted with rev spectto' the' packing cups ofthe valved pistonA 14. .4 A connecting lrody 18 is arranged between the Vseveral'pistons'll and16 and is connected thereto in the manner clearly indicated,v in the Figure '2, thus ing 'said pistons to be moved 'collec- 'solid piston 16'I is connected to the lower end of. the-usual sucker rod 19`exten'ding upwardly ythrough the outletport ofthe reducer'Band througha suitable oil discharge conduit 20 to the mouth of the well, whereupon it is4 passedthrough a suitable packing or stuffing gland 2 1 and is pivotally coni y nectedfas indicated at 2,2; to suitable operating mechanism, generally indicated herein v'by the 'nume1"al"23.l

Tho 'modus oporoodi" of my' improvod pump maybestated to be as follows n Withup strokeof the pistons 14 vand 16,'v oil willbefdrawnbyway ofthe inlet port Y of the reducer 2 through thefstand valve 10 into the lower or settling compartment 5 of the' pumpl barrel 1. Sandfor similar matter fcontained in the oil, of course', will be trapped insaijd compartment 5', settling l4 to the"botto mfthere`of by gravity. jDuring spherical va-lve'lOofrom'the open upper end" [this up stroke ofthe p1 ston"14, it will of `rcourse be understood'lthat the suctionicreated thereby will be suifcient'to remove the of the sand pipe 7, permitting suchv ingress passing intothe upper portion of such cylin- .60 pressure will be imparted to such body. 4of' d ersection 1 1 and thereupon ifntoithev cylin-A der sectionj12' beyond the spherical val-ve.y l5 ofthe piston 14. With movement of the oil -into'the upper. portionv of the cylinder section 11 and into the cylinder section 12,

it will be understood that aportion of ther same "will drain .or pass through thev ports it will be understo'od'that by reason lof 'the downwardly' moving solid piston 16 which is' collectively movable with the piston 14,

oilsuicentto causeforoing of the'same 'from the relaying compartment through` theoutlet opening or port-of the reducer 3' and to the conduit 20 from whence' it will caust,tion of said cylinder 4within t be discharged. This operation of the pump, of course,- willj-be recurring', and in consequence, the lproduction of a steadystream of oil from the outlet end ofthe conduit 20 will bef-produced.; v v

From the foregoing, it will be seen that I have/provided a simple, yet highly practical form of oil pump of the tandem piston type, lwherein the pump in addition to serving as an elevating means for oil, will serve as an eifectualsand trap,thusprevent-v i'ng thepassage ofthe sand intothefpump l cylinders with the resultant gcutting anddeterioratio'n of the cups vof 'the' ,pistons"'l4 and 16 aswell as the'valVe 'of the'piston .14.

AISO, it' will. be appreciated (that bY-rson of 'thefalct that the oil is not vforc'edfrom the tubing y"or conduity 20 upon the upward stroke off the pistons 14 'and'1 6, a"material f lstrain -upon the pump y operating mechanism lwlll'beremoved, and hence, the period of usage thereof willbemateriallyincreased. l

Furthermore, because yof the `aot`that the oiljis' forcedl fout of 'the conduit 'or' tubing 20 upon the downward stroke of thev pis-y tonss14' andf 16, it will be understood`V- that lighteningg'of the" load( or stress upon Vthe pump operating mechanism will occur and furthermore, theA inert weight of l `the pistons as wellas the v'connecting rod l1? and the' sucker rod'19 will "be utilized in the `pressure exerting and oil disehargingunction carried out upon downward stroke of saidy pistons 14 and" 16.vv Likewise, becau'se yof `the fact that the valvedfpiston *114'fworking Within the lower section 11 ofthe pump cylinder [isr arrangedpt aV greater distance from thesand vvalve`1'0 than inthose forms of oilpumps no w prevalent, fii't will' be understood that an added "space 4or tarea? for oil withinfthefcompartment will be provided an'd "that this quantity of oil will serve to oushionthe poundf of the o ilwell which usually 'occursupon the downward 'stroke of the pistons and rods. f

Mnifestlyftho construction shown is capable of' considerable modification, and

' llo 1such modicati'on as isI within the scopeior` my claims,I consider withinfth'e l'spirit of my invention, f

" I claim':--. y 1' 1Q A pumpy offthe characterfdeseribed comprising a barrel having inletV and outlet portsv in its oppositeends, and .divided into superposed compartments, a sand valve yar- {j range'd yin the barrelin proximity to itsin- 13 into. the relayingcompartment6.l Also,

compartment, a solid piston workingin that portion of said "cylindenwithin' ,the upper barrel compartmenhfa portion of the C'ylinderwithin the *upper compartment having ports in thesame,v and meansl for leol` e lower barrel lectively connecting said pistons( and permitting the translnission of rectilinear motion thereto.

2. A pump of the character described comprising a barrel composed of longitudinally aligned sections, a combined coupling and partition Wall connecting the adjacent ends of said sections and dividing the same into superposed compartments, reducer-s engaged in the opposite ends of said barrel forming inlet and outlet ports for the same, a sand valve arranged in proximity to the inlet port and within the lower valve compartment, a cylinder disposed longitudinally of the barrel composed of sections hai-'ing their adjacent ends connected to adjacent portions of said combined coupling and partition, a valved piston working within said section of said cylinder within the lower barrel compartment, a solid piston working in that portion of said cylin der section within the upper barrel compartment, a portion of the cylinder section within the upper barrel compartment having circumferentially disposed ports therein, and means for interconnecting said isto'iis and facilitating transmission of rectllinear motion thereto.

3. A pump of the character described comprising a barrel composed of cylindrical longitudinally aligned sections, a combined couplinv and partition element arranged between the adjacent ends of said barrel sections and connected to the same, reducers engaged in the opposite ends of said barrel formed with ports whereby to permit of ingress and egress of oil to and from said barrel, said combined couplin and partition dividing the pump barre into superposed compartments, a sand pipe supported upon the reducer engaged with the lower end of said pump barrel and extending upwardly for a distance into the lower com partment of said barrel, valve means opera'- tively associated with the upper end of said sand pipe, a pum cylinder comprising sections having thelr'fadjacent ends en aged with adifacent portions of said com ined coupling and'partition immovably arranged and disposed longitudinally of said pump barrel, a valved piston working in that portion of said cylinder section within the lower barrel compartment, a solid piston working in that portion of said cylinder section within the up er barrel compartment, a portion of the cy inder section within the upper barrel compartment havin circumferentially disposed ports forme therein, means for interconnecting said pistons, and other means connected to the pistons for facilitating the imparting of a rectilinear motion thereto.

In witness whereof I have hereunto set my hand.

HERBERT H. WATKINS. 

